Prey is one of our favorite ways to protect your devices against theft. If a laptop or mobile is lost or stolen, Prey can help you recover it. It's free to use for up to three devices, but if you have a family with lots of devices to protect, or just a bunch of your own, you need Prey Pro. StackSocial currently has a deal that knocks 72% off a year's worth of service so you can protect up to 10 devices for only $50.

On top of a higher device limit, the pro version also includes a few additional features. The free version of Prey is pretty solid and enough for most people, but if you need more you can save a lot with this deal.